End tool of surgical instrument, and surgical instrument comprising same

An end tool of a surgical instrument, the end tool comprising:

• a first jaw capable of accommodating a cartridge;
• a second jaw formed to face the first jaw;
• a first jaw pulley coupled to the first jaw and formed to be rotatable around a first shaft;
• a second jaw pulley coupled to the second jaw, formed to be rotatable around a shaft that is substantially the same as or parallel to the first shaft, and formed to be spaced apart from the first jaw pulley by a certain extent;
• a staple drive assembly comprising a first staple pulley and a second staple pulley formed adjacent to the first jaw pulley or the second jaw pulley;
• a first staple wire at least partially in contact with the first staple pulley and configured to transmit, to the first staple pulley, a driving force necessary for rotating the first staple pulley;
• and
• a second staple wire at least partially in contact with the second staple pulley and configured to transmit, to the second staple pulley, a driving force necessary for rotating the second staple pulley,
• wherein the staple drive assembly is connected to a reciprocating assembly of the cartridge and configured to convert a rotational motion of the staple pulley into a linear motion of the reciprocating assembly.

An end tool of a surgical instrument, the end tool comprising:

• a first jaw and a second jaw that are rotatable independently of each other;
• a first jaw pulley coupled to the first jaw and formed to be rotatable around a first shaft;
• a second jaw pulley coupled to the second jaw and formed to be rotatable around a shaft that is substantially the same as or parallel to the first shaft;
• a first staple pulley formed to be rotatable around a shaft that is substantially the same as or parallel to the first shaft, and arranged adjacent to the first jaw pulley;
• a second staple pulley formed to be rotatable around a shaft that is substantially the same as or parallel to the first shaft, and arranged adjacent to the second jaw pulley;
• and
• a staple link assembly connected to each of the first staple pulley and the second staple pulley and reciprocating according to bidirectional rotation of the first staple pulley or the second staple pulley.

An end tool of a surgical instrument, the end tool comprising:

• a first jaw and a second jaw that are rotatable independently of each other;
• a first jaw pulley coupled to the first jaw and formed to be rotatable around a first shaft;
• a first jaw wire of which at least a portion is wound around the first jaw pulley;
• a second jaw pulley coupled to the second jaw and formed to be rotatable around the first shaft;
• a second jaw wire of which at least a portion is wound around the second jaw pulley;
• a pair of end tool first jaw pitch main pulleys formed on one side of the first jaw pulley, and formed to be rotatable around a second shaft forming a predetermined angle with the first shaft;
• a pair of end tool second jaw pitch main pulleys formed on one side of the second jaw pulley, and formed to be rotatable around a shaft that is substantially the same as or parallel to the second shaft;
• a first staple pulley and a second staple pulley formed to be rotatable around the first shaft and arranged between the first jaw pulley and the second jaw pulley;
• a staple link assembly connected to the first staple pulley and the second staple pulley and reciprocating according to bidirectional rotation of the first staple pulley or the second staple pulley;
• a first staple wire at least partially in contact with the first staple pulley and configured to transmit, to the first staple pulley, a driving force necessary for rotating the first staple pulley;
• and
• a second staple wire at least partially in contact with the second staple pulley and configured to transmit, to the second staple pulley, a driving force necessary for rotating the second staple pulley.

A method of driving a surgical instrument, the method comprising operations:

• (a) in which, when a first staple pulley of a staple drive assembly is rotated in a first direction around a first shaft and a second staple pulley is rotated in a second direction opposite to the first direction around the first shaft, a staple link assembly connected to the first staple pulley and the second staple pulley, and a reciprocating assembly of a cartridge connected to the staple link assembly are moved along a second shaft toward a distal end of the cartridge;
• (b) in which, when the reciprocating assembly is moved toward the distal end of the cartridge, an operation member in contact with the reciprocating assembly is moved toward the distal end of the cartridge together with the reciprocating assembly;
• (c) in which, as the operation member is moved toward the distal end of the cartridge, the operation member ejects staples in the cartridge to the outside of the cartridge, and simultaneously, a blade of the operation member is moved toward the distal end of the cartridge;
• and
• (d) in which, when the first staple pulley is rotated in the second direction around the first shaft and the second staple pulley is rotated in the first direction around the first shaft, the staple link assembly connected to the first staple pulley and the second staple pulley, and the reciprocating assembly of the cartridge connected to the staple link assembly are moved toward a proximal end of the cartridge.